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Compact radio emission indicates a structured jet was produced by a binary neutron star merger

文献类型:期刊论文

AuthorGhirlanda, G.1,2,3; Salafia, O. S.1,2,3; Paragi, Z.4; Giroletti, M.5; Yang, J.6,7; Marcote, B.4; Blanchard, J.4; Agudo, I.8; An, T.9; Bernardini, M. G.10,29
SourceSCIENCE
Issued Date2019-03-01
Volume363Issue:6430Pages:968-+
ISSN0036-8075
DOI10.1126/science.aau8815
Corresponding AuthorGhirlanda, G.(giancarlo.ghirlanda@brera.inaf.it) ; Salafia, O. S.(omsharan.salafia@brera.inaf.it)
English AbstractThe binary neutron star merger event GW170817 was detected through both electromagnetic radiation and gravitational waves. Its afterglow emission may have been produced by either a narrow relativistic jet or an isotropic outflow. High-spatial-resolution measurements of the source size and displacement can discriminate between these scenarios. We present very-long-baseline interferometry observations, performed 207.4 days after the merger by using a global network of 32 radio telescopes. The apparent source size is constrained to be smaller than 2.5 milli-arc seconds at the 90% confidence level. This excludes the isotropic outflow scenario, which would have produced a larger apparent size, indicating that GW170817 produced a structured relativistic jet. Our rate calculations show that at least 10% of neutron star mergers produce such a jet.
WOS KeywordAFTERGLOW LIGHT CURVES ; ELECTROMAGNETIC COUNTERPART ; LUMINOSITY FUNCTION ; GRB JETS ; RAY ; GW170817
WOS Research AreaScience & Technology - Other Topics
Language英语
WOS IDWOS:000460194200043
PublisherAMER ASSOC ADVANCEMENT SCIENCE
源URL[http://libir.pmo.ac.cn/handle/332002/23922]  
Collection中国科学院紫金山天文台
Corresponding AuthorGhirlanda, G.; Salafia, O. S.
Affiliation1.Osserv Astron Brera, Ist Nazl Astrofis, Via E Bianchi 46, I-23807 Merate, Italy
2.Univ Milano Bicocca, Dipartimento Fis G Occhialini, Piazza Sci 3, IT-20126 Milan, Italy
3.Ist Nazl Fis Nucl, Sez Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy
4.Joint Inst Very Long Baseline Interferometry VLBI, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands
5.Ist Nazl Astrofis, Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy
6.Chalmers Univ Technol, Onsala Space Observ, S-43992 Gothenburg, Sweden
7.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China
8.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain
9.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Radio Astron, Shanghai 200030, Peoples R China
10.Univ Montpellier, Lab Univers & Particules Montpellier, Inst Natl Phys Nucl & Phys Particules, CNRS,IN2P3, Pl Eugene Bataillon, F-34085 Montpellier, France
Recommended Citation
GB/T 7714
Ghirlanda, G.,Salafia, O. S.,Paragi, Z.,et al. Compact radio emission indicates a structured jet was produced by a binary neutron star merger[J]. SCIENCE,2019,363(6430):968-+.
APA Ghirlanda, G..,Salafia, O. S..,Paragi, Z..,Giroletti, M..,Yang, J..,...&Zhang, M..(2019).Compact radio emission indicates a structured jet was produced by a binary neutron star merger.SCIENCE,363(6430),968-+.
MLA Ghirlanda, G.,et al."Compact radio emission indicates a structured jet was produced by a binary neutron star merger".SCIENCE 363.6430(2019):968-+.

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